土
=
十
+
一
:
Tommy Turtle (tu) wants to fix a cross (十) on a flute (一) in the space station's living room (Ø3). He uses dust and clay (土) to hold them together.
坝
=
土
+
贝
:
The crab (贝) wants to use the ashram's bathroom (a4), but Beelzebub (b) built a dike (坝) made out of dirt (土) and the crab is unable to overcome the dike.